Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 8, Problem 17RQ
Which order of molecular conversions is correct for the Calvin cycle?
- RuBP + G3P → 3-PGA → sugar
- RuBisCO → CO2 → RuBP → G3P
- RuBP + CO2 → [RuBisCO] 3-PGA → G3P
- CO2 → 3-PGA → RuBP → G3P
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Which two products of the light-dependent reactions are used up in the Calvin cycle?
Rubisco adds a CO2 molecule to a sugar that contains _______ carbons. The reaction product immediately splits into two sugars that each contain _______ carbons.
O2 can compete with CO2 for a place in the rubisco active site. As a consequenceO2 is incorporated into RuBP instead of CO2. Why might this be a disadvantage?
Which of the following are products of the Calvin cycle that are then used as reactants in the light reactions?
CO2
Sugar
NADP+
O2
ATP
NADPH
ADP
.
Which of the following is a stage in the light independent reactions in photosynthesis (Calvin cycle)
Group of answer choices
a. release of oxygen
b. photolysis of water
c. photophosphorylation of ADP
d. carboxylation of a 5-C sugar
Chapter 8 Solutions
Biology 2e
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- What is the molecule that leaves the Calvin cycle to be converted into glucose? a. ADP b. G3P c. RuBP d. 3-PGAarrow_forwardWhich part of the Calvin cycle would be affected if a cell could not produce the enzyme RuBIsCO?arrow_forwardMatch each term with its most suitable description. ____ PGAL formation a. absorbs light ____CO2 fixation b. converts light to chemical energy ____ autotroph c. self-feeder ____ ATP forms NADPH does not d. electrons cycle back to photosystem ____ photorespiration e. problem in C3 plants ____ photosynthesis f. Calvin-Benson cycle product ____ pigment g. water molecules split ____ photolysis in photosynthesis h. rubisco functionarrow_forward
- What is the overall purpose of the light reactions in photosynthesis?arrow_forwardDescribe the pathway of energy in light-dependent reactions.arrow_forwardThe Calvin cycle can be divided into which two stages? a.Preparation, fixation, reshuffling, isomerization and phosphorylation b.Fixation, preparation, oxidation, reshuffling and isomerization c.Preparation, fixation, oxidation, isomerization and phosphorylation d.Fixation, preparation, reshuffling, isomerization and phosphorylationarrow_forward
- Which of the following is a product of the light-independent reaction (Calvin Cycle)? Water Oxygen Carbon Dioxide Sugararrow_forwardHow many G3P molecules are made by one run of the Calvin cycle? Group of answer choices a)3 b)0 c)1 d)4 e)2arrow_forwardWhich of the following are products of the dark (light independent, Calvin cycle) reactions of photosynthesis. A. Glucose B. Water C. ATP D. NADP E. Light energy F. NADPH G. Carbon dioxide H. Oxygenarrow_forward
- At the end of the calvin cycle, this molecule is regenergated: Select one: a. a five carbon molecule, ribulose bis-phosphate b. a six carbon molecule, glucose c. a polymer, cellulose d. a three carbon molecule, glyceraldehyde-3-phosphate e. a four carbon molecule, malatearrow_forwardWhich of the following lists the stages of the Calvin cycle in order, starting with the stage where carbon dioxide is added? PGAL synthesis → carbon fixation → light reactions → regeneration of RuBP carbon fixation → PGAL synthesis → regeneration of RuBP regeneration of RuBP → carbon fixation → PGAL synthesis photorespiration → PGAL synthesis → regeneration of RuBP → carbon fixationarrow_forwardWhich of the following statements about the Calvin-Benson cycle is TRUE? Select one: a. Blocking light causes 3PG to accumulate. b. All the statements are false. c. Rubisco catalyzes the formation of RuBP. d. ATP and NADPH + H+ are required to regenerate RuBP. e. More molecules of NADPH than ATP are required per cycle.arrow_forward
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